| Knee instability is a complex condition often resulting from a multiligament knee injury that has received enormous scientific contribution through intense research in the field of orthopedic trauma and sports medicine.The stability and biomechanical function of the knee is maintained by a combination of tibiofemoral articulation and multiligament complex.An injury or disruption in the integrity of these supporting structures will greatly undermine the stability of the knee joint,therefore,it’s extremely important to appreciate the functional anatomy and injury patterns of this individual ligamentous complex of the knee to select an appropriate intervention.The unstable knee can result from an injury to the Anterior cruciate ligament(ACL),posterior cruciate ligament(PCL),posteromedial corner(PMC),posterolateral corner(PLC),or following knee dislocation.So,this article focuses on the general overview of the anatomy and function of these supporting structures.We also reviewed the typical patterns and grading of the knee instability,such as anterior cruciate ligament(ACL)tear as the hallmark of knee instability,the posterior cruciate ligament(PCL)insufficiency being the cornerstone of the knee and the injury of PMC,PLC and knee dislocation.In addition,this study reviewed various treatment modalities practiced by clinicians with advances from conservative management,various surgical interventions to the use of Orthobiological agents with a comprehensive rehabilitation program aimed at restoration of the knee function to a pre-injury state. |